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LONDON - JULY 12: In this photo illustration a lady eats a beefburger on July 12, 2007 in London, England. Government advisors are considering plans for a fat tax on foods high in fat to try to help tackle the fight against obesity. (Photo illustration by Cate Gillon/Getty Images)

LONDON - JULY 12: In this photo illustration a lady eats a beefburger on July 12, 2007 in London, England. Government advisors are considering plans for a fat tax on foods high in fat to try to help tackle the fight against obesity. (Photo illustration by Cate Gillon/Getty Images)